ci2 starts bisection 2025-11-11 22:04:41.574818256 +0000 UTC m=+451571.190281986 bisecting fixing commit since 993bed180178156a70afdafe8aaf23a117107352 building syzkaller on 8d446f1521b580230a60c9ae228bf0c26312c80b ensuring issue is reproducible on original commit 993bed180178156a70afdafe8aaf23a117107352 testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e596418a85551a41ad690c1a80b79885f0706fc8c46985817a8bef111043b61a all runs: crashed: general protection fault in vfs_link representative crash: general protection fault in vfs_link, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 757ae14e565535856c1bdd673a1fca886219afb957fd271fb6500df769c6ef25 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=4921 full=6159 leaves diff=244 split chunks (needed=false): <244> split chunk #0 of len 244 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 36e4caf56ad5f281ec1ae710c182847bcf4c6ebdfa83930613822c8bd39e04af all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4425ef3c782ec91b9aebb9773d58203d652db9a04a630926f5ded530da0a5d9f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 503f81983b8b1a2c0c9ea16436f4b3446ab39987875c7458fc3ccfdb46a50fa8 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1fd6dd8d4c57450f452dab967532d0547072775b4597ea5a42c2478b2e247de0 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 993bed180178156a70afdafe8aaf23a117107352: net/socket.c:1191: undefined reference to `wext_handle_ioctl' net/socket.c:3385: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343: undefined reference to `wext_proc_exit' net/core/net-procfs.c:327: undefined reference to `wext_proc_init' minimized to 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS X86_X32 ZEROPLUS_FF] disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing current HEAD 8a8f52308945f4b0f1a168fa91bd7de0a76e59c4 testing commit 8a8f52308945f4b0f1a168fa91bd7de0a76e59c4 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 80535e0d543e882c2778a063c6ed93e2c209580fc5463e0fa2bd503abf25f13d all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 57m22.814968042s (build: 32m33.6537948s, test: 22m46.479899481s) crash still not fixed or there were kernel test errors commit msg: Merge android13-5.15 into android13-5.15-lts crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link BUG: kernel NULL pointer dereference, address: 0000000000000030 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 110a62067 P4D 110a62067 PUD 110a65067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 387 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:vfs_link+0x19/0x320 fs/namei.c:4521 Code: a6 e9 ff eb bc 41 bc ff ff ff ff eb 87 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 8b 42 28 48 89 7d d0 <4c> 8b 77 30 4c 89 45 c0 8b 80 28 04 00 00 4d 85 f6 89 45 cc 0f 84 RSP: 0018:ffffc900003e3d48 EFLAGS: 00010296 RAX: ffff88810259c800 RBX: ffff8881083d1c18 RCX: ffff888109ff38f0 RDX: ffff88810b0a9178 RSI: ffffffff82e51d20 RDI: 0000000000000000 RBP: ffffc900003e3d88 R08: 0000000000000000 R09: ffffc900003e3b50 R10: ffff88810b0a9218 R11: 0000000000000000 R12: ffff8881083d0800 R13: ffff8881083d0860 R14: ffffc900003e3dd8 R15: 0000000000000000 FS: 00007f9c6e3b96c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 0000000110a54000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_link fs/incfs/vfs.c:638 [inline] dir_link+0x17e/0x250 fs/incfs/vfs.c:1313 vfs_link+0x207/0x320 fs/namei.c:4565 do_linkat+0x1f8/0x2c0 fs/namei.c:4636 __do_sys_linkat fs/namei.c:4664 [inline] __se_sys_linkat fs/namei.c:4661 [inline] __x64_sys_linkat+0x58/0x70 fs/namei.c:4661 x64_sys_call+0x2b3/0x990 arch/x86/include/generated/asm/syscalls_64.h:266 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f9c6e837da9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9c6e3b90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 00007f9c6e965f80 RCX: 00007f9c6e837da9 RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f9c6e88447a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f9c6e965f80 R15: 00007fff57516098 Modules linked in: CR2: 0000000000000030 ---[ end trace 1c26cc5408e5ebd4 ]--- RIP: 0010:vfs_link+0x19/0x320 fs/namei.c:4521 Code: a6 e9 ff eb bc 41 bc ff ff ff ff eb 87 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 8b 42 28 48 89 7d d0 <4c> 8b 77 30 4c 89 45 c0 8b 80 28 04 00 00 4d 85 f6 89 45 cc 0f 84 RSP: 0018:ffffc900003e3d48 EFLAGS: 00010296 RAX: ffff88810259c800 RBX: ffff8881083d1c18 RCX: ffff888109ff38f0 RDX: ffff88810b0a9178 RSI: ffffffff82e51d20 RDI: 0000000000000000 RBP: ffffc900003e3d88 R08: 0000000000000000 R09: ffffc900003e3b50 R10: ffff88810b0a9218 R11: 0000000000000000 R12: ffff8881083d0800 R13: ffff8881083d0860 R14: ffffc900003e3dd8 R15: 0000000000000000 FS: 00007f9c6e3b96c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 0000000110a54000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: a6 cmpsb %es:(%rdi),%ds:(%rsi) 1: e9 ff eb bc 41 jmp 0x41bcec05 6: bc ff ff ff ff mov $0xffffffff,%esp b: eb 87 jmp 0xffffff94 d: 0f 1f 40 00 nopl 0x0(%rax) 11: 55 push %rbp 12: 48 89 e5 mov %rsp,%rbp 15: 41 57 push %r15 17: 41 56 push %r14 19: 41 55 push %r13 1b: 41 54 push %r12 1d: 53 push %rbx 1e: 48 83 ec 18 sub $0x18,%rsp 22: 48 8b 42 28 mov 0x28(%rdx),%rax 26: 48 89 7d d0 mov %rdi,-0x30(%rbp) * 2a: 4c 8b 77 30 mov 0x30(%rdi),%r14 <-- trapping instruction 2e: 4c 89 45 c0 mov %r8,-0x40(%rbp) 32: 8b 80 28 04 00 00 mov 0x428(%rax),%eax 38: 4d 85 f6 test %r14,%r14 3b: 89 45 cc mov %eax,-0x34(%rbp) 3e: 0f .byte 0xf 3f: 84 .byte 0x84